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  <script>
    //数组排序
    //1.翻转数组
    var arr = ['pink', 'red', 'blue'];
    arr.reverse();
    console.log(arr);

    //2.数组排序(冒泡排序)
    var arr1 = [13, 4, 77, 1, 7];
    arr1.sort(function(a, b) {
      return a - b; // 升序的顺序排列
      // return b-a; //降序的顺序排列
    })
    console.log(arr1); 
  </script>
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